BCS: radi po danu/po celi dan

I know the expressions po danu (po+STR:during the day) and po celi dan (po+ACC: all day long).
Talking about an activity (to work, to sleep, to dream...), may I say "po celi dan"/"po celu danu" (po + ACC/STR), with the meanig of "preko dana", "during all the day"?